U.S. patent number 10,525,695 [Application Number 15/432,944] was granted by the patent office on 2020-01-07 for three-dimensional printing method.
This patent grant is currently assigned to Kinpo Electronics, Inc., XYZprinting, Inc.. The grantee listed for this patent is Kinpo Electronics, Inc., XYZprinting, Inc.. Invention is credited to Peng-Yang Chen, Ting-Yu Lu.
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United States Patent |
10,525,695 |
Lu , et al. |
January 7, 2020 |
Three-dimensional printing method
Abstract
A three-dimensional (3D) printing apparatus includes a tank
containing a forming material in liquid, a platform dipped into or
moved away the forming material, a curing device disposed besides
the tank or the platform, and a control device electrically
connected to at least one of the tank and the platform and the
curing device. An inner bottom of the tank includes a forming area
and a peeling area in a stepped shape, and the forming area is
higher than the peeling area. A 3D printing method includes
providing the 3D printing apparatus, then the liquid-state forming
material between the platform and the forming area is cured to form
a solidification layer. Afterwards, a position and an occupied
proportion of the solidification layer corresponding to the inner
bottom, and a movement range of a relative movement is determined
according thereto so as to completely peel off the solidification
layer.
Inventors: |
Lu; Ting-Yu (New Taipei,
TW), Chen; Peng-Yang (New Taipei, TW) |
Applicant: |
Name |
City |
State |
Country |
Type |
XYZprinting, Inc.
Kinpo Electronics, Inc. |
New Taipei
New Taipei |
N/A
N/A |
TW
TW |
|
|
Assignee: |
XYZprinting, Inc. (New Taipei,
TW)
Kinpo Electronics, Inc. (New Taipei, TW)
|
Family
ID: |
62106806 |
Appl.
No.: |
15/432,944 |
Filed: |
February 15, 2017 |
Prior Publication Data
|
|
|
|
Document
Identifier |
Publication Date |
|
US 20180133984 A1 |
May 17, 2018 |
|
Foreign Application Priority Data
|
|
|
|
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Nov 17, 2016 [CN] |
|
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2016 1 1010554 |
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Current U.S.
Class: |
1/1 |
Current CPC
Class: |
B33Y
10/00 (20141201); B29C 64/386 (20170801); B33Y
50/02 (20141201); B33Y 30/00 (20141201); B29C
64/20 (20170801); B29C 64/135 (20170801); B29K
2105/0058 (20130101) |
Current International
Class: |
B33Y
50/02 (20150101); B33Y 30/00 (20150101); B33Y
10/00 (20150101); B29C 64/20 (20170101); B29C
64/135 (20170101); B29C 64/386 (20170101); B29C
64/10 (20170101) |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
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|
|
|
|
203410032 |
|
Jan 2014 |
|
CN |
|
205573044 |
|
Sep 2016 |
|
CN |
|
205573045 |
|
Sep 2016 |
|
CN |
|
107199700 |
|
Sep 2017 |
|
CN |
|
3017802 |
|
May 2016 |
|
EP |
|
Other References
"Office Action of China Counterpart Application", dated Jun. 5,
2019, pp. 1-8. cited by applicant.
|
Primary Examiner: Hindenlang; Alison L
Assistant Examiner: Roy; Debjani
Attorney, Agent or Firm: JCIPRNET
Claims
What is claimed is:
1. A three-dimensional printing method comprising: providing a
three-dimensional printing apparatus, the three-dimensional
printing apparatus comprising: a tank for containing a liquid-state
forming material, wherein an inner bottom of the tank comprises a
forming area and a peeling area, the forming area and the peeling
area are in a stepped shape, and the forming area is higher than
the peeling area; a platform for dipping into or moving away from
the liquid-state forming material; a curing device disposed beside
the tank or the platform; and a control device electrically
connected to at least one of the tank and the platform and
electrically connected to the curing device; curing the
liquid-state forming material between the platform and the forming
area to form a solidification layer; determining a position of the
solidification layer corresponding to the inner bottom of the tank
and an occupied proportion, and determining a movement range of a
relative movement according to the position and the occupied
proportion, the relative movement enabling the solidification layer
to be completely peeled off the forming area; and driving the tank
or the platform to perform the relative movement between the tank
and the platform, such that the solidification layer is peeled off
the forming area and moved to a position above the peeling area,
wherein the inner bottom of the tank is controlled to rotate about
a central axis, and the central axis is located within the forming
area and an area of the forming area is greater than or equal to an
area of the peeling area.
2. The three-dimensional printing method according to claim 1,
wherein the relative movement comprises rotation, translation,
moving close, moving away, or a combination thereof.
3. The three-dimensional printing method according to claim 1,
wherein the inner bottom of the tank comprises a circular contour,
wherein rotation angles occupied by the forming area and the
peeling area with respect to the circular contour are respectively
180 degrees.
4. The three-dimensional printing method according to claim 3,
wherein the tank is rotated and moved away relatively to the
platform.
5. The three-dimensional printing method according to claim 3,
wherein an area occupied by the solidification layer on the
platform corresponds to an area on the inner bottom of the tank
that stretches over the forming area and the peeling area, and the
solidification layer comprises a first solidification layer and a
second solidification layer, a method for forming the
solidification layer comprising: curing the liquid-state forming
material between the platform and the forming area to form the
first solidification layer; driving the tank to rotate by 180
degrees relatively to the platform such that the first
solidification layer is peeled off the forming area and moved to
the position above the peeling area; and curing the liquid-state
forming material between the platform and the forming area to form
the second solidification layer.
6. The three-dimensional printing method according to claim 3,
wherein the solidification layer comprises a first solidification
layer and a second solidification layer, wherein an area occupied
by the first solidification layer and the second solidification
layer on the platform corresponds to an area on the inner bottom of
the tank that only corresponds to the forming area or the peeling
area, a method for forming the solidification layer comprising:
curing the liquid-state forming material between the platform and
the forming area to form the first solidification layer; driving
the tank to rotate by 180 degrees relatively to the platform such
that the first solidification layer is peeled off the forming area
and moved to the position above the peeling area; driving the tank
to rotate by 180 degrees relatively to the platform, the tank being
rotated and moved away relatively to the platform simultaneously or
in sequence; and curing the liquid-state forming material between
the platform and the forming area to form the second solidification
layer, the second solidification layer being stacked on the first
solidification layer.
7. The three-dimensional printing method according to claim 3,
wherein the solidification layer comprises a first solidification
layer and a second solidification layer, wherein areas occupied by
the first solidification layer and the second solidification layer
on the platform correspond to areas on the inner bottom of the tank
that respectively correspond to the forming area or the peeling
area, and a rotation angle of the area occupied by the first
solidification layer on the platform corresponding to the inner
bottom of the tank is smaller than 180 degrees, a method for
forming the solidification layer comprising: curing the
liquid-state forming material between the platform and the forming
area to form the first solidification layer; driving the tank to
rotate relatively to the platform, wherein a rotation angle is
greater than or equal to an angle at the circumference of the first
solidification layer with respect to the inner bottom of the tank
such that the first solidification layer is peeled off the forming
area and moved to the position above the peeling area; and curing
the liquid-state forming material between the platform and the
forming area to form the second solidification layer.
8. The three-dimensional printing method according to claim 1,
wherein a number of the peeling area is at least two, and the
forming area is located between the peeling area.
9. The three-dimensional printing method according to claim 8,
wherein the tank is translated relatively to the platform.
10. The three-dimensional printing method according to claim 1,
wherein the three-dimensional printing apparatus is a stereo
lithography apparatus or a digital light processing apparatus.
Description
CROSS-REFERENCE TO RELATED APPLICATION
This application claims the priority benefit of China application
serial no. 201611010554.5, filed on Nov. 17, 2016. The entirety of
the above-mentioned patent application is hereby incorporated by
reference herein and made a part of this specification.
BACKGROUND
Field
The disclosure relates to a three-dimensional printing method.
Description of Related Art
As technology advanced in the recent years, many methods that
utilize additive manufacturing technology (e.g., layer-by-layer
model construction) to build three-dimensional (3D) physical models
have been proposed. Generally speaking, the additive manufacturing
technology involves converting design data of a 3D model, which is
constructed by software, such as computer aided design (CAD), into
multiple thin (quasi-two-dimensional) cross-sectional layers that
are stacked in sequence.
Currently, many techniques for forming a plurality of thin
cross-sectional layers have been developed. For example, a movement
platform is disposed in a liquid-state forming material, and a
light source is driven to irradiate on the liquid-state forming
material along X-Y coordinates according to X-Y-Z coordinates
constructed according to the design data of the 3D model, thereby
curing the liquid-state forming material into correct shapes of the
cross-sectional layers. Next, as the movement platform moves along
a Z-axis, the liquid-state forming material forms a
three-dimensional article in a state of layer-by-layer curing and
stacking.
However, as mentioned above, the movement platform has to move
along the Z-axis once whenever one solidification layer is
completed, which takes excessive time in movement of the movement
platform along the Z-axis direction and results in excessive
manufacturing time and lack of efficiency.
SUMMARY
The disclosure provides a three-dimensional printing method capable
of effectively peeling off a solidification layer and thereby
enhancing a printing efficiency.
The three-dimensional printing method of the disclosure includes
providing a three-dimensional printing apparatus, wherein the
three-dimensional printing apparatus includes a tank, a platform, a
curing device, and a control device. The tank is configured to
contain a liquid-state forming material, wherein an inner bottom of
the tank includes a forming area and a peeling area in a stepped
shape, and the forming area is higher than the peeling area. The
platform is configured to dip into or move away from the
liquid-state forming material. The curing device is disposed beside
the tank or the platform. The control device is electrically
connected to at least one of the tank and the platform and to the
curing device. Next, the liquid-state forming material between the
platform and the forming area is cured to form a solidification
layer. Afterwards, a position of the solidification layer
corresponding to the inner bottom of the tank and an occupied
proportion are determined, and a movement range of a relative
movement is determined according to the position and the occupied
proportion. The relative movement enables the solidification layer
to be completely peeled off the forming area. Then, the tank or the
platform is driven to perform the relative movement of the tank and
the platform, such that the solidification layer is peeled off the
forming area and moved to a position above the peeling area.
In light of the above, in the three-dimensional printing method
provided above, the inner bottom of the tank of the
three-dimensional printing apparatus is divided into the forming
area and the peeling area in a stepped manner, wherein the higher
forming area is the area where the solidification layer is formed.
Afterwards, the relative movement takes place between the tank and
the platform to peel the solidification layer off the forming area
through a shear force, so that forming steps of a next
solidification layer can be subsequently performed. Moreover, the
position where the solidification layer (article) is formed on the
platform is determined and the movement range required for the
relative movement is determined according to the position, such
that the solidification layer can be completely peeled off the
forming area through the relative movement, and the manufacturing
time can thereby be effective reduced.
To provide a further understanding of the aforementioned and other
features and advantages of the disclosure, exemplary embodiments,
together with the reference drawings, are described in detail
below.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a schematic diagram illustrating a three-dimensional
printing apparatus according to one embodiment of the
disclosure.
FIG. 2 is a flowchart illustrating a three-dimensional printing
method according to one embodiment of the disclosure.
FIG. 3A and FIG. 3B are partial side views respectively
illustrating the three-dimensional printing apparatus of FIG. 1 in
different states.
FIG. 4 is a partial bottom view illustrating the three-dimensional
printing apparatus of FIG. 1 in a different state according to
another embodiment.
FIG. 5 is a partial bottom view illustrating the three-dimensional
printing apparatus of FIG. 1 in a different state according to
another embodiment.
FIG. 6 is a partial schematic diagram illustrating a
three-dimensional printing apparatus according to another
embodiment.
DESCRIPTION OF THE EMBODIMENTS
The foregoing and other technical content, features, and effects of
the disclosure will be clearly presented in the following detailed
description of the embodiments with reference to the reference
drawings. Directional terminology, such as "upper", "lower",
"front", "back", "left", "right", "bottom", "top", etc., mentioned
in the embodiments below is used with reference to the orientation
of the drawings attached. Accordingly, the directional terminology
used will be regarded as illustrating rather than limiting the
disclosure. Moreover, in the embodiments below, the same or similar
components will be marked with the same or similar reference
numerals.
FIG. 1 is a schematic diagram illustrating a three-dimensional
printing apparatus according to one embodiment of the disclosure.
In the present embodiment, a three-dimensional printing apparatus
100 includes a tank 110, a platform 120, a curing device 130, and a
control device 140. The tank 110 is configured to contain a
liquid-state forming material 200. The platform 120 is disposed
relatively to the tank 110 and is configured to dip into or move
away from the liquid-state forming material 200. The curing device
130 is disposed beside the tank 110 or beside the platform 120 for
curing the liquid-state forming material 200 between the platform
120 and the tank 110 to form at least one solidification layer (not
illustrated) on the platform 120. Through layer-by-layer curing and
stacking, the solidification layer is finally formed into a
three-dimensional object. The control device 140 is electrically
connected to at least one of the platform 120 and the tank 110 and
is also connected to the curing device 130 to drive the components
to move relatively to each other.
Here, the three-dimensional printing apparatus 100 is, for example,
a stereo lithography (SL) apparatus or a digital light processing
(DLP) apparatus. The liquid-state forming material 200 is, for
example, a photosensitive resin. Accordingly, the control device
140 drives the curing device 130 (e.g., a curing light source) to
irradiate light such that the liquid-state forming material 200 is
cured and formed on the platform 120. However, the disclosure is
not limited hereto. Any materials and corresponding stacked layer
manufacturing means that can achieve the foregoing step of forming
the three-dimensional article are all applicable here.
In light of the above, in the present embodiment, through the
curing device 130, the liquid-state forming material 200 is cured
and stacked layer by layer on a forming plane P1 of the platform
120. Meanwhile, with a relative movement (e.g., rotation and moving
away) of the tank 110 and platform 120, the three-dimensional
object is finally formed.
In addition, the disclosure does not limit a number of the curing
device 130 and its position relative to the tank 110. Although the
present embodiment illustrates the curing device 130 as below the
tank 110, it may substantially be correspondingly disposed
according to the conditions required for formation. In other words,
on the condition that the curing device 130 can effectively cure
and form the liquid-state forming material 200 on the platform 120
to gradually form the three-dimensional object with a bottom-up
elevation movement of the platform 120, the curing device 130 may
be at any adequate position beside the tank 110 or beside the
platform 120.
In the present embodiment, an inner bottom of the tank 110 includes
a forming area 112 and peeling area 114 in a stepped manner,
wherein the forming area 112 is higher than the peeling area 114,
and a coating layer 116 such as polytetrafluoroethene (PTFE) or
polydimethylsiloxane (PDMS) is disposed on a surface of the forming
area 112. The control device 140 drives the tank 110 to rotate
relatively to the platform 120 about a central axis C1, and the
control device 140 further controls the platform 120 to move
relatively to the tank 110 along the central axis C1 to move the
platform 120 close to the tank 110 or away from the tank 110. When
the foregoing relative rotation is performed, an area on the
platform 120 switchably corresponds to the forming area 112 or the
peeling area 114 of the tank 110. Here, "correspond" means that a
specific area on the platform 120 may move to a position right
above the forming area 112 or right above the peeling area 114 of
the tank 110 at different times, wherein a relative distance
between the platform 120 and the forming area 112 can be adjusted
as required by the control device 140.
Specifically, the inner bottom of the tank 110 has a circular
contour and is controlled to rotate about the central axis C1.
Rotation angles of the forming area 112 and the peeling area 114
with respect to the inner bottom of the tank 110 occupied by the
circular contour are respectively 180 degrees. In other words, a
same area of the platform 120 can switch between states of
corresponding to the forming area 112 and corresponding to the
peeling area 114 as the tank 110 is rotated by 180 degrees once.
Moreover, an area of the forming area 112 is substantially greater
than an area of the peeling area 114. In other words, the central
axis C1 on which the tank 110 is rotated is substantially located
in a range of the forming area 112. As illustrated in FIG. 1, due
to such configuration, the light of the control device 140
irradiated to the forming area 112 from below the tank 110 is free
from negative effect of light scattering resulting from a stage
difference structure 111 in a stepped shape.
According to a three-dimensional printing method provided in the
disclosure, FIG. 2 is a flowchart illustrating a three-dimensional
printing method according to one embodiment of the disclosure that
is applicable to the three-dimensional printing apparatus disclosed
above for printing a three-dimensional object on a platform. FIG.
3A and FIG. 3B are partial side views respectively illustrating the
three-dimensional printing apparatus of FIG. 1 in different
states.
Referring to FIG. 1, FIG. 2, FIG. 3A, and FIG. 3B at the same time,
first, in step S201, the three-dimensional printing apparatus 100
is provided. Please refer to the foregoing embodiments for relevant
descriptions of the three-dimensional printing apparatus 100, which
shall not be repeatedly described here.
Next, in step S202, the liquid-state forming material 200 between
the platform 120 and the forming area 112 is cured to form a
solidification layer A1 (as illustrated in FIG. 3A). Accordingly,
after being irradiated by a curing light source provided by the
curing device 130, the liquid-state forming material 200 is cured
and formed on the platform 120 and is formed into the
solidification layer A1. Specifically, only areas irradiated by the
curing light source are cured. Moreover, instead of overall
irradiation, the areas irradiated by the curing light source are
determined by a cross-sectional layer design of a shape of the
three-dimensional object to be formed. Accordingly, in step S202, a
position where a curing reaction takes place is limited to an area
between the platform 120 and the forming area 112 that includes the
liquid-state forming material 200.
Afterwards, step S203 is firstly performed to determine a position
where the solidification layer is formed and determine a movement
range of a relative movement according to the position. Then, in
step S204, the control device 140 drives the tank 110 or the
platform 120 such that the tank 110 and the platform 120 move
relatively to each other and the solidification layer A1 is peeled
off the forming area 112 and moved to a position above the peeling
area 114. Specifically, the three-dimensional object to be printed
may come in the following forms: a fully-distributed object, an
object only distributed on a left half or a right half of the
platform, and an object distributed on both the left and right
halves of the platform. Different printing forms of objects affect
a mode of the relative movement between the tank and the platform
in step S204.
Here, the relative movement refers to, for example, rotation,
translation, moving close, moving away, or a combination thereof.
For example, the control device 140 drives the tank 110 to rotate
relatively to the platform 120 such that the solidification layer
A1 formed in step S202 is rotated with the platform 120 and is
peeled off the forming area 112 and moved to a position
corresponding to the peeling area 114. Moreover, due to the
step-shaped structure of the inner bottom of the tank 110, the
solidification layer A1 is substantially suspended above the
peeling area 114 (as illustrated in FIG. 3B). In addition, the
coating layer 116 disposed on the surface of the forming area 112
contributes to reducing a viscous force and a friction between the
solidification layer A1 and the forming area 112 such that the
solidification layer A1 is smoothly peeled off the forming area
112. Accordingly, with the relative rotation movement, the
solidification layer A1 is peeled off the inner bottom of the tank
110 through a shear force, thus avoiding the need to apply force
along the central axis C1 (normal to the forming area 112), which
wastes more manufacturing time. Next, the liquid-state forming
material 200 between the forming area 112 and the platform 120 is
cured to form a solidification layer B1, and the solidification
layer B1 is peeled off the forming area 112 through performing the
foregoing step S204 again. Repeating the curing and peeling steps
in this way, the liquid-state forming material is formed into the
three-dimensional object in a state of layer-by-layer curing and
stacking.
It shall be stated that, as long as the relative movement is
generated between the tank 110 and the platform 120, the
solidification layer A1 can be peeled off the forming area 112 and
moved to the position above the peeling area 114. In the present
embodiment, the control device 140 is used to drive the tank 110 to
rotate relatively to the platform 120. In another embodiment, the
platform 120 remains stationary while the inner bottom of the tank
110 in a circular contour is controlled to rotate about a central
axis C1, thereby generating the relative movement between the tank
110 and the platform 120. In another embodiment, the tank 110 and
the platform 120 may also move relatively to each other by rotating
while moving away. However, the disclosure is not limited hereto,
and the manner of the relative movement may be selected according
to the needs to save the manufacturing time.
In step S203, where the three-dimensional object to be printed is a
fully-distributed object (namely, an area occupied by the object on
the platform 120 corresponds to an area on the inner bottom of the
tank 110 that stretches over the forming area 112 and peeling area
114), after the solidification layer of step S202 is formed, the
tank 110 is rotated by 180 degrees (as illustrated in FIG. 3B) in
step S203. Through a shear force created by the relative movement,
the solidification layer A1 is peeled off the forming area 112, and
at this time, the forming area 112 corresponds to another area to
be printed of the platform 120 to form the solidification layer B1.
Specifically, since the inner bottom of the tank 110 includes both
the forming area 112 and the peeling area 114, the corresponding
positions of the platform 120 and the forming area 112 have to be
switched to achieve the purpose of printing a fully-distributed
object. Accordingly, after the solidification layer A1 is formed,
the solidification layer A1 is first peeled off through the
relative rotation movement in step S203. At this time, the forming
area 112 of the tank 110 corresponds to the another area to be
printed of the platform 120, and the liquid-state forming material
200 between the platform 120 and the forming area 112 is then cured
to form the solidification layer B1. Next, the platform 120 is
driven to rise along the central axis C1 to continue with the
foregoing steps of layer-by-layer curing and stacking to complete
the object to be printed. In this process, the relative movement
between the tank 110 and the platform 120 includes relative
rotation by 180 degrees first, and then moving away relatively to
each other. However, the disclosure is not limited hereto. In
another embodiment, the relative rotation and moving away between
the tank 110 and the platform 120 may take place simultaneously,
and a path of the relative movement between the tank 110 and the
platform 120 is thus in a spiral shape. For example, if a height of
each elevation of the platform 120 is a fixed value (e.g., 0.1 mm,
which is, for example, a thickness of a single layer of the
solidification layer), while the tank 110 is driven to rotate, the
platform 120 is driven to rise, and the 0.1 mm to be elevated of
the platform 120 is distributed in 180 degrees. In other words, at
this time, the tank 110 is rotated while moving away relatively to
the platform 120, and after the tank 110 is rotated by 180 degrees,
the platform 120 has simultaneously been elevated by 0.1 mm. Of
course, a slope of path of the spiral-shaped path is not limited
here. In another unillustrated embodiment, the platform 120 may be
elevated by the foregoing height each time when the tank 110 is
rotated by 10 degrees, depending on the configuration of the
solidification layer on the platform, material characteristics of
the solidification layer, and the desired printing precision of the
three-dimensional object.
FIG. 4 is a partial bottom view illustrating the three-dimensional
printing apparatus of FIG. 1 in a different state according to
another embodiment. Referring to FIG. 4, in step S203, where the
three-dimensional object to be printed is an object only
distributed on the left half or the right half of the platform (for
example, an object 300 (rendered in broken lines) is only
distributed on the left half of the platform 120 (rendered in
broken lines) here), after the solidification layer of step S202 is
formed, the tank 110 is first rotated by 180 degrees to peel the
solidification layer off the forming area 112 through the shear
force generated by the relative movement. Next, after the platform
120 is elevated along the central axis C1, the tank 110 is rotated
by 180 degrees again. At this time, the forming area 112
corresponds to the left half of the platform 120 again and
continues with the steps of layer-by-layer curing and stacking, and
a formed next solidification layer is stacked on the previous
solidification layer to form the object 300. In this process, the
relative movement between the tank 110 and the platform 120
includes relative rotation first, and then moving away relatively
to each other. However, the disclosure is not limited hereto. In
another embodiment, the relative rotation and moving away between
the tank 110 and the platform 120 may take place simultaneously,
and a path of the relative movement between the tank 110 and the
platform 120 is thus in a spiral shape. Relevant descriptions of
the relative movement (rotation and moving away) that takes place
here between the tank 110 and platform 120 are similar to the
foregoing embodiments and are thus not repeatedly described
here.
FIG. 5 is a partial bottom view illustrating the three-dimensional
printing apparatus of FIG. 1 in a different state according to
another embodiment. Referring to FIG. 5, in step S203, where the
three-dimensional article to be printed is an object distributed on
both the left and right halves of the platform, after the
solidification layer of step S202 is formed (e.g., formed into an
object 302a), the tank 110 is rotated by a specific angle .theta.1
first, wherein the angle .theta.1 is greater than or equal to an
angle at the circumference of the object 302a with respect to the
inner bottom of the tank 110 to exactly enable the object 302a on
the platform 120 to be peeled off the forming area 112. Next, after
the platform 120 is elevated along the central axis C1, at this
time, the forming area 112 corresponds to another area to be
printed on the platform 120 and printing of the object 302b
continues. Afterwards, the tank 110 is rotated again to a specific
angle .theta.2 to peel the object 302b off the forming area 112. In
this process, the relative movement that takes place between the
tank 110 and the platform 120 includes relative rotation first, and
then moving away relatively to each other. However, the disclosure
is not limited hereto. In another embodiment, the relative rotation
and moving away between the tank 110 and the platform 120 may take
place simultaneously, and a path of the relative movement between
the tank 110 and the platform 120 is thus in a spiral shape.
Relevant descriptions of the relative movement (rotation and moving
away) that takes place here between the tank 110 and platform 120
are similar to the foregoing embodiments and are thus not
repeatedly described here.
Accordingly, the position where the solidification layer (article)
is formed is first determined in step S203, and the movement range
required for the relative movement is then determined according to
the position of the article to exactly enable the solidification
layer to be completely peeled off the forming area through the
relative movement (e.g., rotation, moving away, or a combination
thereof). Taking the relative rotation movement as an example, as
long as the article can be peeled off the forming area through
rotation by a specific angle (e.g., rotation by 45 degrees), it is
not necessary to excessively rotate (e.g., by 180 degrees), and a
time spent in the manufacturing process can be saved. In another
embodiment, the determination step in step S203 may also be
completed in a model construction stage before printing begins.
However, the disclosure is not limited hereto.
FIG. 6 is a partial schematic diagram illustrating a
three-dimensional printing apparatus according to another
embodiment. Since FIG. 6 merely schematically illustrates the tank
and the platform of the three-dimensional printing apparatus,
reference may be made to the three-dimensional printing apparatus
100 of FIG. 1 for other components of the three-dimensional
printing apparatus and relevant descriptions thereof. Components
identical to those in FIG. 1 are marked with the same numerals, and
the same characteristics of the same components are not repeatedly
described here. As illustrated in FIG. 6, the three-dimensional
printing apparatus 100 includes a tank 110a and a corresponding
platform 120a. An inner bottom of the tank 110a is in a stepped
shape and includes a forming area 112a, a peeling area 114a, and a
peeling area 114b, wherein the forming area 112a is located between
the peeling area 114a and the peeling area 114b, and the forming
area 112a is higher than the peeling area 114a and the peeling area
114b. Therefore, if a cross section is taken along a longer side of
the tank 110a, a cross section of the inner bottom of the tank 110a
will rise in the middle. Moreover, a coating layer 116a such as
polytetrafluoroethene (PTFE) or polydimethylsiloxane (PDMS) is
disposed on a surface of the forming area 112a. The control device
140 drives the tank 110a to translate relatively to the platform
120a, and the control device 140 further controls the platform 120a
to move relatively to the tank 110a along a central axis C2 to move
the platform 120a close to the tank 110a or away from the tank
110a. During the relative translation, an area on the platform 120a
switchably corresponds to the forming area 112a or the peeling area
114a and the peeling area 114b of the tank 110a. Here, "correspond"
means that a specific area on the platform 120a may move to right
above the forming area 112a or right above the peeling area 114a
and the peeling area 114b of the tank 110a at different times,
wherein a relative distance between the platform 120a and the
forming area 112a can be adjusted as required by the control device
140.
Specifically, compared to FIG. 1, the embodiment disclosed in FIG.
6 differs in the shape of the tank and the configuration of the
inner bottom thereof. Therefore, when step S204 is performed, the
manner of the relative movement taking place between the tank 110a
and the platform 120a is also different. For example, the control
device 140 drives the tank 110a to translate relatively to the
platform 120a, such that the solidification layer formed in step
S202 is translated with the platform 120a and is peeled off the
forming area 112a and moved to a position corresponding to the
peeling area 114a or the peeling area 114b. Due to the step-shaped
structure of the inner bottom of the tank 110a, the solidification
layer is substantially suspended above the peeling area 114a or the
peeling area 114b. Moreover, similar to the foregoing embodiment of
FIG. 1, the tank 110a and the platform 120a may move relatively to
each other by translating while moving away so as to reduce the
manufacturing time.
In summary of the above, the three-dimensional printing method
provided in the disclosure is applicable to the three-dimensional
printing apparatus disclosed above. The inner bottom of the tank is
divided into the forming area and the peeling area in a stepped
shape, wherein the higher forming area is the area where the
solidification layer is formed. Afterwards, the relative movement
takes place between the tank and the platform to peel the
solidification layer off the forming area through a shear force, so
that forming steps of a next solidification layer can be
subsequently performed. Moreover, the position where the
solidification layer (article) is formed on the platform is
determined and the movement range required for the relative
movement is determined according to the position, such that the
solidification layer can be completely peeled off the forming area
through the relative movement, and the manufacturing time can
thereby be effectively reduced.
Lastly, it should be noted that the embodiments above are merely
meant to describe the technical solutions of the disclosure rather
than limit the disclosure. Although the embodiments above have
described the disclosure in detail, any person skilled in the art
shall understand that he or she may still make modifications to the
technical solutions recited in the embodiments above or make
equivalent replacements of part or all of the technical features
therein. The modifications and replacements do not cause the nature
of the corresponding technical solutions to depart from the scope
of the technical solutions of the embodiments of the
disclosure.
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